Torsion of the gallbladder.
D000006:Abdomen, Acute / Q000209:etiology; D000368:Aged; D005260:Female; D005705:Gallbladder Diseases / Q000175:diagnosis / Q000601:surgery*; D006801:Humans; D014102:Torsion Abnormality / Q000175:diagnosis / Q000601:surgery